1. superlative form of plummy; most resembling or containing plums; having the characteristics of plums
Usage: informal; chiefly British
2. superlative form of plummy; most desirable, profitable, or attractive (said of a job, role, or opportunity)
Usage: informal; chiefly British
3. superlative form of plummy; having the most refined, upper-class, or affected accent or manner of speech
Usage: informal; chiefly British

Examples

• The plumiest role in the new film went to the lead actor.
• She spoke in the plumiest accent, which made her stand out at the party.
• This year's harvest produced the plumiest fruit we've ever seen.
• He landed the plumiest job offer from three competing companies.
• The plumiest part of the estate overlooked the valley.